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Antelope clicks knees to demonstrate sexual fitness, scientists find
the unusual approach adds to the list of signals that are known in the animals to provide an indication of their status .
reporting in the journal bmc biology, the researchers say that the depth of the sound correlates to body size .
the tactic signals the bulls' fighting potential, establishing mating rights .
to demonstrate their sexual prowess, peacocks spread their tail feathers, men flex their muscles and correland antelope, it seems, click their knees .
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Generated 2008-11-5_18:22
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